Global Patent Index - EP 0140246 A1

EP 0140246 A1 1985-05-08 - A thin film electroluminescent display device.

Title (en)

A thin film electroluminescent display device.

Title (de)


Title (fr)

Dispositif d'affichage électroluminescent à film mince.


EP 0140246 A1 (EN)


EP 84112241 A


US 54022383 A

Abstract (en)

A thin film electroluminescent display device comprising a transparent electrode layer, a segmented electrode layer, an electroluminescent phosphor layer between the electrode layers, and an improved dark field material disposed as a layer between the phosphor and segmented electrode layers. The improved dark field layer is of a composition of a dielectric material, such as the preferred magnesium oxide, and a noble metal, which in the preferred version is gold. These materials comprising the dark field composition may be co-evaporated by an electron beam evaporation or other suitable deposition technique. The composition of dark field material provides for contrast enhancement is non-toxic, and is readily analyzable.

IPC 1-7 (main, further and additional classification)

H05B 33/22

IPC 8 full level (invention and additional information)

H05B 33/22 (2006.01)

CPC (invention and additional information)

H05B 33/22 (2013.01)

Citation (search report)

  • GB 2039146 A 19800730 - LOHJA AB OY [FI]
  • GB 2109161 A 19830525 - FAN JOHN C C
  • DE 3114199 A1 19820325 - STEELE GORDON N, et al
  • US 4312915 A 19820126 - FAN JOHN C C
  • US 3560784 A 19710202 - STEELE GORDON N, et al
  • Thin Solid Films, Vol. 89, No. 2, March 12, 1982, Elsevier Sequoia, Netherlands S. BERTHIER "Optical Properties of Au-MgO Cermet Thin Films: Percolation Threshold and Grain Size Effect" pages 213-220 * totality *
  • Applied Physics Letters, Vol. 29, No. 8, October 15, 1976, Massachusetts, USA FAN. ZAVRACKY "Selective Black Absorbers using MgO/Au Cermet Films" pages 478-480 * totality *

Designated contracting state (EPC)


DOCDB simple family

EP 0140246 A1 19850508; EP 0140246 B1 19870916; CA 1243762 A 19881025; DE 3466342 D1 19871022